Condensed water recovery device

Abstract

The utility model relates to the technical field of condensed water recovery of steam turbines, in particular to a condensed water recovery device which comprises a condenser, the condenser comprises a first water pipe, a first water pump, an exhaust pipe, a vacuum pump, a preheater and a water storage tank, a coil pipe is arranged in the preheater, an inlet of the coil pipe is connected with the first water pipe, and an outlet of the coil pipe is connected with a second water pipe. The device has the advantages that gas exhausted from the condenser is secondarily utilized, heat of the gas is fully utilized to preheat condensed water, the heat is recycled, meanwhile, preheating is conducted on the subsequent deoxidizing process, the heat is recycled, the heat is recycled, the heat is recycled, the heat is recycled, the heat is recycled, the heat is recycled, the heat is recycled, the heat is recycled, the heat is recycled, the heat is recycled, and the heat recycling efficiency is improved. Meanwhile, moisture in gas pumped out by the vacuum pump is recycled through secondary condensation, water resources are saved, and therefore the device has better economical efficiency compared with the prior art.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of steam turbine condensate recovery, particularly to a condensate recovery device. BACKGROUND

[0002] Steam turbine is an external combustion rotary machine that can convert steam heat energy into mechanical work. Steam from the boiler enters the steam turbine and then passes through a series of annularly arranged nozzles and moving blades, converting the heat energy of the steam into mechanical energy for the rotation of the rotor of the steam turbine. The steam undergoes energy conversion in different ways in the steam turbine, thus forming steam turbines with different working principles. The steam after doing work is discharged into the condenser and cooled by cooling water to condense into water, i.e. condensate. The condensate is pumped into the low-pressure heater by the condensate pump, heated, and then deaerated and further heated by the deaerator. The treated water is pressurized by the feedwater pump and then sent to the boiler drum, forming a closed circulation system.

[0003] The existing condensate recovery device is a condenser that condenses the steam after doing work through heat exchange and uses a vacuum pump to perform vacuum pumping on the condenser to discharge the air and other non-condensable gases in the condenser. However, the discharged gases still contain part of the water and heat, which cannot be fully utilized, resulting in waste of energy. SUMMARY

[0004] The utility model aims to provide a condensate recovery device that can fully recover heat and water resources and has good economic efficiency.

[0005] The above technical purpose of the utility model is achieved by the following technical scheme: the condensate recovery device comprises a condenser, the condenser comprises a water pipe one, a water pump one, a gas extraction pipe, and a vacuum pump, and further comprises a preheater and a water storage tank. A coil pipe is arranged in the preheater, the inlet of the coil pipe is connected with the water pipe one, the outlet of the coil pipe is connected with a water pipe two, the water pipe two is connected with the water storage tank, the shell side of the coil pipe is connected with the gas extraction pipe, and the shell side of the coil pipe is provided with an air outlet pipe.

[0006] Preferably, the condenser has a steam inlet, a hot well one, a cooling pipe, a water inlet, and a water outlet.

[0007] Preferably, a hot well two is arranged at the bottom of the preheater, the hot well two is connected with a water pipe three, the water pipe three is connected with the water storage tank, and a water pump two is arranged on the water pipe three.

[0008] In summary, the utility model has the following beneficial effects: the device performs secondary utilization on the gases extracted from the condenser, fully utilizes the heat to preheat the condensate, preheats the subsequent deaeration process while recovering heat, effectively saves energy, and through secondary condensation, recovers the water in the gases extracted by the vacuum pump, saves water resources, and thus has better economic efficiency compared with the prior art. Attached Figure Description

[0009] Figure 1 This is a structural schematic diagram of an embodiment.

[0010] In the diagram, 1. Condenser; 11. Water pipe 1; 12. Water pump 1; 13. Exhaust pipe; 14. Vacuum pump; 15. Steam inlet; 16. Hot well 1; 17. Cooling pipe; 18. Water inlet; 19. Water outlet; 2. Preheater; 21. Coil; 22. Water pipe 2; 23. Exhaust pipe; 24. Hot well 2; 25. Water pipe 3; 26. Water pump 2; 3. Water storage tank. Detailed Implementation

[0011] The present invention will be further described in detail below with reference to the accompanying drawings.

[0012] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0013] Example: Figure 1 As shown, the condenser includes a condenser 1, a preheater 2, and a water storage tank 3. A steam inlet 15 is located at the top of the condenser 1, allowing steam to enter the shell side of the condenser 1 after work is completed. Multiple cooling pipes 17, made of metal, are arranged horizontally inside the condenser 1 and are used to transport coolant. Inlet 18 and outlet 19 are connected to both sides of the condenser 1, respectively. The inlet 18 and outlet 19 are connected to the two ends of the cooling pipes 17, respectively. Coolant enters the condenser 1 through the inlet 18, passes through the cooling pipes 17, reaches the outlet 19, and is then discharged. A hot well 16 is located at the bottom of the condenser 1. A water pipe 11 is connected to the hot well 16 for water discharge, and the water pipe 11 is connected to the preheater 2. A water pump 12 is installed on the water pipe 11 to transport the condensate from the hot well to the preheater 2. The shell side of the condenser 1 is connected to an extraction pipe 13, which is connected to the preheater 2. A vacuum pump 14 is installed on the extraction pipe 13 to evacuate the inside of the condenser 1, thereby removing air and other non-condensable gases from the condenser 1.

[0014] Condenser 1 is equipped with a coil 21. The inlet of coil 21 is connected to water pipe 11, and the outlet of coil 21 is connected to water storage tank 3 via water pipe 22. The top of the shell side of preheater 2 is connected to the extraction pipe 13. An outlet pipe 23 is connected to the lower shell side of preheater 2. The bottom of condenser 1 has a hot well 24, and a water pipe 25 is connected to the hot well 24. The water pipe 25 is connected to water storage tank 3, and a water pump 26 is installed on the water pipe.

[0015] Working principle: Coolant enters condenser 1 through inlet 18, is transported to outlet 19 via cooling pipe 17, and is then discharged. Steam that has completed its work enters the shell side of condenser 1 through steam inlet 15, exchanges heat with cooling pipe 17, and condensate is generated on the cooling pipe 17. The condensate drips into hot well 16 and is collected. The condensate in hot well 16 is then pumped to preheater 2 by pump 12.

[0016] While the above process is underway, the vacuum pump 14 extracts air and other non-condensable gases from the condenser 1, which then enter the preheater 2 through the outlet pipe 23. The gases, being at a high temperature and containing some steam, enter the preheater 2 along the top of the shell side. Condensate from hot well 16 enters the condenser 1 through coil 21 and is then transported to the water storage tank 3. In the condenser 1, the shell-side gas contacts the coil 21, resulting in heat exchange and heating. Simultaneously, the steam in the gas condenses on the surface of the coil 21, forming condensate. This process recovers heat and moisture from the shell side of the preheater 2. The gas in the shell side of the preheater 2 is then discharged through the outlet pipe 23. The condensate dripping from the coil 21 falls into hot well 24 and, with the operation of water pump 26, is transported to the water storage tank 3 along water pipe 25.

[0017] Through the above process, the gas extracted by the vacuum pump 14 in condenser 1 is used to preheat the condensate, increasing its temperature and helping to save energy for the subsequent deoxygenation process while reducing energy waste. Furthermore, the steam condensation in the shell side of preheater 2 during the heat exchange process forms secondary condensate, which can be collected and reused, achieving resource conservation and making it more economical.

Claims

1. A condensate recovery device comprising a condenser (1) including a water pipe (11), a water pump (12), a suction pipe (13), and a vacuum pump (14), characterized in that, It also includes a preheater (2) and a water storage tank (3), the preheater (2) is provided with a coil (21), the inlet of the coil (21) is connected with a water pipe I (11), the outlet of the coil (21) is connected with a water pipe II (22), the water pipe II (22) is connected with the water storage tank (3), the shell side of the coil (21) is connected with a suction pipe (13), and the shell side of the coil (21) is provided with an exhaust pipe (23).

2. The condensate recovery device of claim 1, wherein The condenser (1) has a steam inlet (15), a hot well I (16), a cooling pipe (17), a water inlet (18) and a water outlet (19).

3. The condensate recovery device of claim 2, wherein, The bottom of the preheater (2) is provided with a hot well II (24), the hot well II (24) is connected with a water pipe III (25), the water pipe III (25) is connected with the water storage tank (3), and the water pipe III (25) is provided with a water pump II (26).

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